Adds the Z-index of the elements,
Adds buttons to move objects to the front, or to the back.
Adds a folder with default values (except the map),
Adds the default values (for the CompositionArea and the ElementShutter) in the Configuration class.
Adds a button on the ElementShutter that create a new MapImage,
When a GrapghicalElement is created, the UIController register and draw it,
The OWSContext CA does an auto-initialisation, it loads the first OWS-Context file of the workspace folder.